A trio of striped Hyena cubs stand on their play-blanket at the Kenya Wildlife Service headquarters on March 24 in Nairobi where they have lived since their rescue a month ago.The striped hyaena has been widely hunted through poisoning, baiting traps, pits, or with the help of dogs. A tentative estimate of the total worldwide population size is 5,000 to 14,000 individuals. less

A trio of striped Hyena cubs stand on their play-blanket at the Kenya Wildlife Service headquarters on March 24 in Nairobi where they have lived since their rescue a month ago.The striped hyaena has been widely ... more

Photo: TONY KARUMBA, AFP/Getty Images

A trio of striped Hyena cubs stand on their play-blanket at the...photo-1180331.16487 - |ucfirst

A five-day-old gorilla baby sleeps in the arms of its mother in the Zurich, Switzerland, zoo March 2.

A five-day-old gorilla baby sleeps in the arms of its mother in the Zurich, Switzerland, zoo March 2.

Photo: WALTER BIERI, AP

A five-day-old gorilla baby sleeps in the arms of its mother in the...photo-1180333.16487 - |ucfirst

White-Handed Gibbon mother Betina, 32, holds her two-week-old baby at the Safari zoo in Ramat Gan near Tel Aviv on March 17. The birth of the gibbon surprised the zoo staff, as it had been 11 years since Betina last gave birth. less

White-Handed Gibbon mother Betina, 32, holds her two-week-old baby at the Safari zoo in Ramat Gan near Tel Aviv on March 17. The birth of the gibbon surprised the zoo staff, as it had been 11 years since Betina ... more

A female Masai giraffe was born on March 4 at the McGovern Giraffe Exhibit in the African Forest at the Houston Zoo.

A female Masai giraffe was born on March 4 at the McGovern Giraffe Exhibit in the African Forest at the Houston Zoo.

Photo: Eric Kayne, For The Chronicle

A female Masai giraffe was born on March 4 at the McGovern Giraffe...photo-1180342.16487 - |ucfirst

This image provided by the San Diego Zoo shows a 2-week-old Sichuan takin climbing to the highest point in his exhibit Jan. 12. The kid, who was born on Dec. 28 was named Wûshi, which means 50 in Mandarin, because he is the 50th takin to call the Zoo home. Takins are a type of hoofed mammal that is sometimes referred to as a goat antelope because it has things in common with both species. less

This image provided by the San Diego Zoo shows a 2-week-old Sichuan takin climbing to the highest point in his exhibit Jan. 12. The kid, who was born on Dec. 28 was named Wûshi, which means 50 in Mandarin, ... more

Photo: Ken Bohn, AP

This image provided by the San Diego Zoo shows a 2-week-old Sichuan...photo-1180343.16487 - |ucfirst

A black-and-white ruffed lemur born a month ago is seen at the zoo in Cali, Valle del Cauca, Colombia, on March 7.

A black-and-white ruffed lemur born a month ago is seen at the zoo in Cali, Valle del Cauca, Colombia, on March 7.

Photo: LUIS ROBAYO, AFP/Getty Images

A black-and-white ruffed lemur born a month ago is seen at the zoo...photo-1180346.16487 - |ucfirst

Keo-co, a bright orange male infant Francois leaf-eating monkey, the first to be raised by its mother in Australia, explores its enclosure at Sydney's Taronga Zoo on March 16. Keo-co was discovered cradled in its mother's arms in the early morning of Jan. 30 by zoo keepers who had been monitoring the pregnancy of the birth of the highly endangered southeast Asian monkey. less

Keo-co, a bright orange male infant Francois leaf-eating monkey, the first to be raised by its mother in Australia, explores its enclosure at Sydney's Taronga Zoo on March 16. Keo-co was discovered cradled in ... more